Transformer



Nov. 2 1926. 1,605,026

L. H. HILL El AL TRANSFORMER Filed Sept. 10. 1 2 Sheets-Sheet 1WITNESSES:

INVENTORS Leland/ MW AF /3 BY Wa/ferfll Dan/1.

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Nov. 2 1926. 1,605,026 I L. H. HILL Fr AL @l' 1 23 r B 27 'l 26 2f M 5 FI .4. F7 .5

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WITNESSES: INVENTORS gakihwq Patented Nov. 2, 192a.

-LELAND H. HILL, EWIBGVALI, L1H) WALTEB mam, 0]

PERI-- mvam ABSIGH'OBS T0 WESTINGHOUSE ELEGIEBIG G: MAM! GOI- FLH'Y, A.GOBPORLTIOH OI PENNSYLVANIA.

Application fled September 10, 198. Serial 10. 186,888.

Ourinvention relates to incased apparatus, such as oil-immersedtransformers, and particularly'to apparatus of this character, that isprovided with external I radiators for aiding in the dissipation of theheat (generated in the transformer.

It is desirable to have the external radiators of large transformers orsimilar apparatus detachable in order that they may be removed duringtransit on accountof the size Y of the transformer tank. The transformerwindings are carefully dried and the tank filled with hydrated oil whenthe transformer is tested in the factory prior to ship'- ment. In orderto avoid a repetition of these operations when the transformer is placedin service, it is desirable to ship the tank filled with oil. Prior toour invention it was necwsary to remove the oil after the transformerwas tested, re1nove the radiators and provide special closures for theradiator openings, refill the tank with oil and then remove the oilagain at the place of installatio in order to attach the radiators.

25 it has been proposed to use valves between the tank and the radiatorbut this ement has not been considered practicable be- A cause theordinary valves obstructed the flow of oil and the length of the valvegreatly increased the acing between the radiator and the tank. Thedisadvantages of this construction were the decreased rating efliciencyand the increased size of the transformer, and these defects were soserious as to preclude the use of any type of valve heretofore. Theincreased sizeof the trans f 7 limi ed the maximum capacityof apparatusthat could be shipped assembled.

Furthermore the increased spacing of the radiators weakened theconstruction, as the raglirators are ordinarily supported on the Inaccordance with ourinvention, a telescoping valve is provided which doesnot obstruct the flow of oil through the radiator,

and does not appreciably increase the spacing between the radiator andthe tank. In this manner, the disadvantages attendant upon the use of anordinary valve are over-' M come. In a transformer equi pad with thesevalves between the tank an the radiator, the'removal and replacement ofa defective radiator may be accomplished without disconnecting thetransformer from service, if one of the radiators becomes damaged.

For a more complete understanding of the nature of our. invention,reference should be had to the accompanying drawings in which Flgure 1is a view in vertical section of an incased transformer invention;

Fig. 2 is an end view of the valve shown in connection with thetransformer of Fig.1;

Fig. 3 is a vertical sectional view througi the valve shown in Fig. 2;

Fig. 4 is a plan view, partially in section and partially 1nelevation,'of thevalvc shown in'Figs. 2 and 3; and I Fig. 5 is avertical sectional viewof a mfication. F d

to ig. 1, 10 enotes a casing enclosing an oil-immersed transformer 11and provided with detachable radiators 12, onl one being shown. Valves13 of a. s cia construction are interposed between 2 e :gsipgg of thetransformer 10 and the rad1a-' It will be understood that the purpose ofthe radiator 12 is to increase the heat-dissipating and radiatingcapacity of the tank and thereby increase the load rat' of thetransformer. The telescoping v ves 13 have a valve disc and seatprojecting into the transformer tank and ofl'er substantiall noobstruction to the flow of oil throng 85 the radiators. If it is no todetach the radiators 12 during transit or in case the radiator isdamaged, the valves are covered with a cover plate 14 to prevent loss ofoil in case the-valve istampered with.

As shown in Figs. 2, 3 and 4, the valve 13 comprisesa fian 'e or basemember 15 in which the operating rod '16 of the valve is supported. Anintegral tubular portion 17 of the valve projects through the connectingportion '18 of the transformer tank into the tank'itself. The valve 13is secured to the transformer flange 19 by threaded studs 20 having ashoulder 21 engagin the base 15 of the valve. The opening in e tubularportion 17 of the valve is closed b means of a valve disc 22 sup rtedupon a orizon tal valve stem 23. line valve stem 23 is mounted in a finor crossbar 24 (see Fig. 4)

embodying our an appreciable extent.

tween these e and is tprovided with a collar 25 oo-operating wi acompression spring 26 encircling the valve stem. ,The spring 26, beingnormally under compression, tends to close the valve. disc 22 upon thevahleiseat formed bytheend of the tubular member 17. A layer of cork or.other suitable packing material 27 is carried by the valve disc '22 tocooperate with the valve seat in order to make the valve oil tight. Aneccentric cam 28 is mounted on the valve rod 16 and isadapted toreciprocate the .valve stem and disc as the valve rod 16 is turned,thereby opening and closins the valve. The valve rod 16 1s rovided.withan operating member or han e 35 for mani ulating the same. The cam28, is provided with a notch 29 co-operating with the rounded head ofthe collar 25 to latch the valve rod and disc in the open position.

As shown in 4,;the radiator 12 is securedtothetank yanut30uponthestud20, the radiator havin a flange 31 co-opcrating with said stu Thisconstruction permits removal of the radiator while mainthe valve inosition on the flan of the tank since the oulder21 of the stud 20 holdsthe valve in place. Since the same stud secures boththe valve and theradiator to the tank the construction is simple and compact. Theconnections between the flangeof the tank, the valve and theradiator aremade oiltight by the use of gaskets 32.

. The area of the opening through the valve 18 is substantially the sameas thearea of the opening in e radiator flange 18- and tests haveindicated that the heat radiating ca aci of the apparatus is not reduwliim evalve is used. Therefore, the flow of oil to the radiators is notobstructed to Furthermore, the spacing of the radiator item the tank isonly in by an amount equal to the thickness of the flange or base 15,which is only a small part of the normal spacing ements. Therefore, theuse of the valvedoes not weaken the construction as would be the'case ifthe heavy radiator were aced at a relatively large distance from a tank.Such a'construction would require ertra heavy flangesjon the transformertank or additional braces and these are avoided by the use of ourinvention. In Fig, Ii is shown a modification of our inventionin whichthe flange 19 of the transformer tank is drilled to receive the valverod 16-andthe inner surface of the flange is finished at the point Blitoprovide a seat for the valve disc 22. The bly of the valve shown in Fig.5 is exactly the same as that shown" in the preceding I I except for thechanges noted. The t a r issecumddirectl'ytotheflan 19'inthe usualmanner. By means of construction, structure of the valve is further-'sun abile we have described the best'means known to us for carryingout the invention, it should be understood that such descrip-- tion isto be 'interpretcdin an illustrative rather than in'a' limiting senseand that we do, not wish to be restricted thereby tb the exactdetailsshown except as may be defined in the appended claims.

- We claim as our invention:

1. The combination of a transformer tank, a radiator, said tank having atubular pro portion to which said radiator- 18 secu and avalve-telescoping with the transformer, the valve comprising operatingelements I nrn vill said PlQjOOtifi o rtion and a disc connected theretoin r insideofsaidtank. f 2. The combination of a transform tank, aradiator,*a horizontal connection be 7 tween-said tank and saidradiator, a valve disc provided with a horizontal a sa'id oonnectiomandmeans includmg a cam coopera' with'said stem for operating said valv iadisc.

3. The combination with a transformer stem fortank, a radiator and avalve between said tank and radiator, of securing studs-in said tankhaving a shoulder'engaging said valve and means on said stud for theradiator to the tank. 4. The combination of a. transformertank, aradiator, said tank ha atubular proj portion to which an radiatorssecureavalveatructurecomp" a tubular portion mscrtable into thevtfaliifiarportion oi the a disc io'rcl Inner amid the, tubular portion 0 thevalve,ope n means forthedisc, anda co opera i; with the outerends' ofthe tubular portiom of the tank and valve for forming a fluid-tight-'0int.

5. The combination 0 'a transformer tank, a radiator, said tank having atubular proiecting rtion to which said radiator is secured, a vestructure comprisinga tubular portion insertable into the tubularportion of the tank, a disc biased to its closed position forclosing'the inner end of the tubular portion of the'valve, operatingmeans for the disc,.and a flange co-operating with the outer ends of thetubular portions of the tank and valve for forming a fluid-tight-joint.

6. The combination of a transformer tank, a radiator, said tank havinatubular g p i c ing portion to which said radiator is se a structurecomprising a r tubular In on insertable into the tubular portion of thetank, a at its outer end,a disc'biased to its closed position'forclosing the inner end of the tubular'por- -tion of the valve, andoperatingmeans for the disc, said flange co-operating with the p tubularportion of the tank and the radiator of the valve, and operating meansfor the for forming a fluid-tight joint. disc, said flange fittingbetween the tubular 7. The combination of a transformer portion of thetank and the radiator for tank, a radiator, said tank having a tubularforming a fluid-tight joint.

5 projecting portion to which said radiator is In testimony whereof, wehave hereunto secured, a valve structure comprising a subscribed ournames this 4th day of Septubular portion insertable into the tubulartember, 1924. portion of the tank, a flange at its outer i end, a discbiased to its closed position for -LELAND H. HILL.

10 closing the inner end of the tubular portion WALTER M. DANN.

10 closing the inner end of the tubular portion of the valve, and ocrating means for the disc, said flange fitting between the tubularportion of the tank and the radiator for forming a fluid-tight joint.

In testimony whereof, We have hereunto subscribed our names this 4th dayof September, 1924.

LELAND H. HILL. WALTER M. DANN.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,605,026, grantedNovember 2. 1926, upon the application of Leland H. Hill, of Swissvale,and \Valtr-ar M. Dann, of ilkinsburg, Pennsylvania, for an improvementin Transformers, errors appear in the printed specification requiringcorrection as follows: Page 1, line 13. for the word hydrated readdehydrated, and line 32, for the Word rating, read radiating; page 2,line 81, claim 1, after the Word transformer insert the word tank; andthat the said, Letters Patent should be read with these correctionstherein that the same may conform to the record of the case in thePatent ()fiice.

Signed and sealed this 7th day of December, A. D. 1926.

[sun] M. J. MOORE, Acting Commissioner of Patents.

Certificate of Correction.

It is hereb certified that in Letters Pabent No. 1,605,026, grantedNovember 2. 1926, u on tie up lication of Leland H. Hill, of Swissvale,and Walter M. Dam, of Wil insburg, ennsylvania, for an improvement inTransformers, errors appear in the rinted specification requiringcorrection as follows: Page 1, line 13. for the word ydrated readdehydrated and line 32, for the word rating, road mdzbting" age 2, line81, claim 1, after the word transformer insert the word tank; and-t atthe sai Letters Patent should he read with these corrections thereinthat the same ma con cm to the record of the case in the Patent ()flice.

Signed and se ed this 7th day of December, A. D. 1926.

[SEAL] V M. J. MOORE,

Acting Gammksa'oner of Patents.

